Electric-arc lamp.



No. 667,585. I Patented Feb. 5, l90l. A. SCHWEITZER.

ELECTRIC ARC LAMP.

(Application filed Oct. 6, 1900.)

3 Sheets8heet I.

(No Model.)

ll-Illi 1 ill Patented Feb. 5, 190i.

A. SCHWEITZER.

ELECTRIC ARC LAMP.

(Application filed Oct. 6, 1900.)

3 Shaets--Sheet 3'.

(No Model.)

0mm wzrzns co. womuwow WASHINGTON, n, c

UNITED STATES PATENT OFFICE.

ALBERT SCHWEITZER, OF PITTSBURG, PENNSYLVANIA.

ELECTRIC-ARC LAM P.

SPECIFICATION forming part of Letters Patent No. 667,585, datedFebruary5, 1901.

Application filed October 6, 1900. Serial No. 32,281. (No model.)

To all whom it may concern:

Be it known that I, ALBERT Sonwnrrzna, a citizen of the United States ofAmerica, residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements in Arc-Lamps, of which the following is a specification, reference being hadtherein to the accompanying drawings.

This invention relates to certain new and practically a continuous andsteady light at all times.

The in vention still further aims to construct all parts in such amanner that they will antomatically operate and adjust themselves as thecarbon is burned and provide for a continuous feed of the same.

Another object of the present invention is to construct a lamp of theabove-described character that will be extremely simple in construction,strong, durable, highly efficient in its operation, and comparativelyinexpensive to manufacture.

With the above and other objects in view the invention consists in thenovel combination and arrangement of parts to be hereinafter more fullydescribed, and specifically pointed out in the claims.

In describing the invention in detail reference is had to theaccompanying drawings, forming a part of this specification,and whereinlike numerals of reference indicate corresponding parts throughout theseveral views, in which- Figure 1 is a side elevation of my improvedarc-lamp. Fig. 2 is a vertical sectional view thereof. Fig. 3 is adetail side elevation of the armature and its attachments. Fig. 4; is asimilar view of the carbon-holder and carbon. Fig. 5 is a verticalsectional view of the enlarged portion of the inner casing. Fig. 6

is a top plan View of the same with the top removed therefrom. Fig. 7 isa side elevation of the bracket serving to retain the casing. Fig. 8 isa top plan view thereof. Fig. 9 is a plan view of the resistance-coil.Fig. 10 is an enlarged view of the locking device to retain the outerglobe. Fig. 11 is a perspective view of a portion of the band secured tothe outer globe. Fig. 12 is an enlarged vertical sectional view of thevalve arranged in the plunger. Fig. 13 is a vertical sectional viewshowing the connections between the connectingrod and the tubularcasing.

Referring to the drawings by reference-numerals, 1 indicates a hangerhaving upwardlyextending bifurcated ends 2, in which is mounted a pulley3, the lower end of said hanger being interiorly screw-threaded, asshown at 4, to receive the interior tubular casing 5, which isexteriorly screw-threaded at its upper end, as shown at 6, to engage theinterior screw-threads 4 of the hanger. The interior tubular casing 5 isscrew-threaded at its lower extremity, as shown at 7, to receive thescrew-threaded cap 8 of the enlarged portion of the interior casing 9,the latter being screw-threaded at its upper end, as shown at 10, andengages the screw-threaded cap. The said enlarged portion of theinterior casing carries a bottom 11, in which are arranged posts 12 13.The bottom is further centrally provided with a boss l t, and to theinterior wall of said casing is rigidly secured a bracket 15, carrying arod 16, extending downwardly through the aperture 17in the bottom 11. Atthe end of said rod 16 is attached a lowercarbon holder 18, in which isarranged an opening 19 to receive the lower carbon 20. The carbon-holderis further provided with a set-screw 21 for the purpose of holding thecarbon.

Rods 22 are pivotally secured at 23 to the lower extremity and outerwalls of the enlarged portion of the interior casing. These rods arecurved outwardly and extend vertically at their lower ends, as shown at23'. The vertically-extending portion is screwthreaded, as shown at 24,to receive adjusting-nuts 25. The vertically-extending portions of thesaid rods are also encircled by spiral springs 26. has at its upperendapertured lugs 28, formed integral therewith, and which are adapted toThe U-shaped hanger 27 receive the vertically-extending portion 23 ofthe rod. The spiral springs 26 bear against the under face of the saidlugs. Acup-shaped portion 28 is arranged centrally in the U- shapedhanger 27 and is formed integral therewith, said cup-shaped portionbeing adapted to receive the lower end 29 of the globe 30. The upper endof said globe abuts against the under face of the bottom 11 of theenlarged portion of the interior casing.

The reference-numeral 31 indicates the solenoid-core, arranged in theinterior airtight tubular casing 5, said solenoid-core carrying ametallic tube 32, having formed at its upper extremity an opening 33,and pivotally connected thereto is a rod 3%. In the upper end of thisrod at are arranged a vertical air-passage 35 and air-ports 36,extending transversely thereto and communicating therewith, said rodbeing further provided at its upper end with screw-threads 37. The upperextremity of said rod is cup-shaped, as shown at 38, to receive a ball39, forming a check-valve. A plunger 40, carrying interior screw-threads4:1, is secured upon the end of the said rod and held in position on itsunder side by means of a nut 42 and on its upper face by means of a nut43, the latter having centrally formed therein a recess 44:,communicating with the air-port 45.

The reference-numeral 46 indicates a carbon-holder which is slidablyarranged in said tube 32, said carbon-holder being formed of a splitcollar 47 to receive the upper carbon 48. The said collar 47 carries atits upper extremity an outwardly-extending retractile spring 49 and acentral upwardly-extending rod 50, the latter serving as a stop inlimiting the upward movement of the carbonholder.

The reference-n umeral 51 represents a gravity-clutch secured to thelower end of the said tube 32, the latter being formed of an annularhead 52, adapted to embrace the lower end of said tube 32 and carryingdownwardlyextending apertured lugs 53, adapted to receive the bifurcatedends 54 of the arms 55, which are pivotally secured at 56 to said lugsThese arms 55 carry U-shaped ends 57, which are adapted to clamp andfrictionally engage the upper carbon.

The reference-numeral 58 represents a canopy arranged at the upper endof the interior tubular casing and forming a portion of the outercasing. 59 represents the outer casing carrying an inwardly extendingannular flange 60 and a downwardly-extending portion 61, formed integraltherewith, and having secured to its lower end a cap 62, to which issecured a contracted tubular portion 63, extending upwardly into thetubular portion 61. A shade-holder 64 is secured to the inner air-tighttubular casing, the latter having formed integral therewith adownwardlyextending annular flange 65. The outer face of said flange isprovided with swiveled hooks 66, pivotally secured at 67 and carrying ahook portion 68. Slots 69 are arranged in said downwardly-extendingflange 65.

The reference-numeral 70 indicates a split band, which is adapted toencircle the upper portion 71 of the outer globe 72, said split bandbeing provided with an outwardly-extending flange 73, having formedtherein an aperture 74 for the reception of an adjusting- Screw 75,extending through the said flange to the stud 76, the latter beingrigidly secured to the split band and arranged in close proximity to thelug 73, said stud being provided with a head 77, forming a neck 78,being adapted to receive a chain or cord, the hook portion 68 of thehook 66 engaging the stud 76 and serving as fastening means for theouter globe.

The reference-numeral 79 represents a cylindrical casing carrying anouter layerof insulated material 80, to which are secured a series ofresistance-coils 81. Formed integral with said cylindrical casing 79 atits upper portion is a spider 82. Arranged upon said spider is a spring83, forming a contact-point. The bottom of said cylindrical casing islikewise formed in a spider 84 and is arranged upon the interior tubularcasing 5. The reference-numeral 85 represents a switch encircling thesaid iuterior tubular casing and is arranged above the casing 79 anddirectly above the spider 82. A binding-post 86 is arranged upon theunderneath face of the spider 82, and a binding-post 87 is arranged uponthe upper face of the spider 8i, said bindingpost 86 extending upwardlythrough the canopy 58 and terminating in a binding-post. A correspondingbinding-post 89 is arranged upon the opposite side of the canopy andextends downwardly, forming a contact-point 90, arranged upon the spider82 and carrying a spring 83.

The reference-numeral 91 represents a solenoid arranged upon theinterior tubular casing, said solenoid carrying at its upper extremitypins 92, to which is rigidly secured a spider 93, carrying spring-arms94, adapted to engage the inwardly-extending annular flange 60 andserving to retain the outer casing in position. To the binding-post 87is secured a wire 95, leading to the solenoid. From the lower end ofsaid solenoid is secured a wire 96, extending downwardly through thecontracted tubular portion 63 to the screwthreaded plug 97, secured inthe boss 98 and extending into the bracket 15.

The reference-numeral 99 indicates a wire secured to the annular head 52and connected at 100 to the post 13.

The operation of my improved arc-lamp is as follows: \Ve will assumethat the wire of the positive current is attached to the bindingpost 89and that of the negative to the binding-post 88 and that the switch isoperated so as to form a contact with the contact-point and complete theelectrical circuit by grounding the same through the interior casing ofthe lamp and creating an are between the carbons, the negative currentpassing from the lower carbon to the carbon-holder through the wire 96into the solenoid and through the resistance-coils into the binding-post88 to the dynamo.

Having thus fully described myinvention, what I claim as new, and desireto secure by Letters Patent, is-

1. In an arc-lamp, the combination of an interior air-tight casing, aplunger arranged in said casing and provided with air-passages, meansfor controlling said air-passages, an upper-carbon holder arranged insaid casing and having contact-springs at its upper end, agravity-clutch for engagement with the upper carbon, a lower-carbonholder, swinging rods carrying a bracket for supporting the globe, asolenoid, and an insulated casing arranged above the solenoid,substantially as described and shown.

2. In an arc-lamp, the combination of an interior air-tight casing, aninsulated casing attached thereto, resistance-coils carried by saidinsulated casing, a solenoid carried by the interior casing, anarmature, a plunger provided with air-pa'ssages,a check-valve controlling said passages, a slidable upper-carbon holdera gravity-clutchfor engagement with the upper carbon,a lower-carbon holder,a globe, andmeans for forming an air-tight seal with the globe, substantially asdescribed.

3. In an arc-lamp, the combination of an interior air-tight tubularcasing, a cylindrical casing attached thereto, a layer of insulatedmaterial surrounding said cylindrical casing, resistance-coilssurrounding said insulated material, a magnet arranged upon saidinterior tubular casing, an armature arranged in said interior tubularcasing carrying a tubular casing, a plunger arranged in said tubularcasing having air-passages arranged therein, a check-valve controllingsaid air-passages, an upper-carbon holder slidably arranged in saidcasing, a gravity-clutch arranged at the lower end of said casingengaging the carbons, a lower-carbon holder, a globe, and means ofretaining said globe air-tight.

at. In an arc-lamp, the combination of an interior tubular air-tightcasing, a plunger arranged in said interior tubular casing having formedtherein air-passages, a check-valve controlling said air-passages,saidplungerconnected to a tubular casing and an armature, a carbon-holderarranged in said tubular casing, contact-springs arranged at the upperend of said carbon-holder to engage the inner sides of said casing, agravity-clutch arranged at the lower end of said tubular casing engagingthe carbon, a lower-carbon holder carrying a carbon, and a globe,swinging rods, a U shaped bracket attached to said swinging rods,springs attached to the lower end of said swinging rods to retain theglobe airtight, a solenoid surrounding a portion of said interiortubular casing, a cylindrical casing arranged on said interior tubularcasing above said magnet, a layer of insulated material surrounding saidcylindrical casing, re sistance-coils arranged around said insulatedlayer, and a switch, all parts being arranged and operatingsubstantially as herein shown and described.

In testimony whereof I affix my signature in the presence of twowitnesses.

ALBERT SOHWEITZER. Witnesses:

JOHN N OLAND, H. O. EVERT.

